Kootenay Filter Pre-Filter 500SL | Air Filter Replacement

Extend Filter Life with the Kootenay 500SL Air Filter Replacement Designed for SL500 filters without a flange, the Kootenay Filter Pre-Filter 500SL blocks dust, debris, and larger particulates from reaching and clogging your primary filter. This replacement pre-filter enhances air filtration efficiency, supports odor control, and reduces system maintenance over time. With a 16'' diameter, 20'' length, and compatibility with 6'', 8'', and 10'' flanges, it’s a versatile and essential component for hydroponic grow rooms, HVAC systems, and ventilation setups. Improve indoor air quality and extend the lifespan of your main filter with this simple, effective solution. Possible Flanges 6''/ 8'' / 10'' Diameter 16'' Length 20'' Pre-Filter for SL500 Without Flange